RIVER WALK. Also known as Paseo del Rio, this picturesque stretch of San Antonio's downtown is technically a city park but is better recognized as a dining and entertainment haven. Built a full story below street level, it offers three miles of stone pathways that line both banks of the San Antonio River. Some areas are peaceful and quiet while others are noisy and fun with clusters of restaurants, bars, hotels, and even strolling mariachi bands. The area is also pleasant when viewed from river taxis and charter boats, some of which serve dinner.